Part B6 Rainwater harvesting and use
Introduction to this Part
This Part sets out the requirements for the design, construction, installation, replacement, repair, alteration and maintenance of any part of a rainwater harvesting system.
The Objective of this Part is to—
- safeguard people from illness, injury or loss (including loss of amenity) due to the failure of a rainwater harvesting system; and
- conserve water; and
- safeguard the environment; and
- safeguard public and private infrastructure; and
- ensure that a rainwater harvesting system installation throughout its serviceable life will continue to satisfy the requirements of Objectives (a) to (d).
Rainwater harvesting systems must be designed and installed so as to operate in a way that avoids the likelihood of inadvertent contamination of any drinking water service, and minimises any adverse impact on building occupants, the Network Utility Operator's infrastructure, property and the environment.
BP6.1 Stored rainwater
A rainwater harvesting system must be designed, constructed and installed in such a manner as to reduce the likelihood of stored rainwater becoming contaminated or otherwise posing a hazard to public health.
BP6.2 Rainwater harvesting system installation
A rainwater harvesting system must be designed, constructed and installed in such a manner as to—
provide water to fixtures and appliances at flow rates and pressures which are required for the correct functioning of those fixtures and appliances under normal conditions; and
avoid the likelihood of failure and uncontrolled discharge; and
facilitate the efficient use of drinking water; and
allow access, as required, for maintenance of mechanical components and operational controls; and
BP6.3 Rainwater service
There are no Verification Methods in this Part.
B6.2 Collection of rainwater
A rainwater harvesting system must only collect roof water.
B6.3 Top-up lines
B6.4 Buried and partially buried tanks
For the purposes of Section 16 of AS/NZS 3500.1, the following applies:
A rainwater tank that is set into and completely covered by earth is a 'buried tank'.
A rainwater tank that is not in any way set into the ground is an 'above-ground tank'.
In determining the appropriate description applicable under this clause, access openings, inlets and outlets to a tank may be ignored.